Soru

A 29-year-old man is evaluated in the intensive care unit due to sudden-onset hemodynamic instability. He was admitted two days prior for acute respiratory distress syndrome secondary to severe bacterial pneumonia. He is currently intubated and receiving pressure-controlled mechanical ventilation with high positive end-expiratory pressure. A nurse calls the physician to the bedside after the ventilator begins alarming for consistently high peak airway pressures. Current vital signs show a blood pressure of 72/40 mm Hg, a heart rate of 145/min, and an oxygen saturation of 82% despite an $FiO_2$ of $1.0$. Physical examination reveals absent breath sounds over the right hemithorax, hyperresonance to percussion on the right side, and prominently distended jugular veins. The trachea appears deviated to the left. Which of the following is the single most urgent initial step in the stabilization of this patient?